So... the comp cams pushrod checker measures "0.140 gauge length"


Questions:

1) Am I correct in assuming that "0.140 gauge length" means the distance between the points on the ends where the perpendicular cross section diameter is 0.140"?

2) Check my math - so on a 5/16 pushrod, that means "theoretical length" is about 0.033" longer than what the comp cams checker tells you?


Alternatively...

If you have a comp cams pushrod checker and a caliper big enough to measure it, can you check the difference between the indicated length and what you actually measured?

[edited to change answer to 0.033]

 

??? What effect would the diameter have on the length of the pushrod length checker???

Let's say you have checker that is 7.000" at it's minimum length. I know that one of the Comp checkers adds 0.050" for every turn of the barrel end. Whatever the turns add up to is added to the minimum length. ex. 1-1/2 turns would be 0.150" added to 7.000" for a total of 7.150".

That's the only math I see that needs doing.

 

If you are using a comp cams pushrod checker, then that would be the only math required to find the "0.140 gauge length" that the comp cams tool measures.

Now, how do you get from there to theoretical length?

 

Ah! Math was wrong - was using a diameter instead of a radius.

Now I get 0.033, which is the same that comp shows in a diagram.

The diagram wasn't labeled as to pushrod diameter, so I wasn't sure it was showing for a 5/16 pushrod.